燕子琪 学术报告
Title: A BPS Road to Holography
Speaker: Ziqi Yan (燕子琪)
Affiliation: The Niels Bohr Institute, Copenhagen University, Denmark (丹麦哥本哈根大学尼尔斯·玻尔研究所)
Time: 14:00-15:00, Tuesday, 16th October, 2025 (UTC+8, Beijing Time)
Venue: Room 1502, Shing-Tung Yau Center, Yifu Architecture Building, Sipailou Campus of Southeast University, Nanjing (东南大学四牌楼校区逸夫建筑馆丘成桐中心1502室)
Inviter: Qiang Wen (文强）
Abstract
I will discuss BPS limits of M-theory that lead to U-dual webs of decoupled theories, whose fundamental degrees of freedom are described by matrix theories. All these BPS limits are organized by five different duality orbits of M-theory in DLCQs. Via a generalization of the TTbar deformation to p-branes, this leads to a classification of holographic constructions in string theory. I will show that non-Lorentzian geometric techniques play an indispensable role in this framework. By examining the fundamental strings in these decoupled theories, I will argue how Lorentzian supergravity arises from the corner associated with the IKKT matrix theory and how non-Lorentzian supergravities arise from other T-dual corners, including the one associated with the BFSS matrix theory.